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Erosion corrosion

Erosion corrosion is a process that involves both corrosion and erosion.

Generally, metallic corrosion involves the degradation of an exposed metal surface. Corrosion occurs in various forms ranging from uniform attacks over the entire surface to severe local attacks.

The rate of corrosion attack is accelerated by the relative motion of a corrosive liquid and a metal surface. The attack is localised in areas with high velocity or turbulent flow. Erosion corrosion attacks are characterised by grooves in a directional pattern.
Examples of metals that are subject to erosion corrosion: